Hot-air furnace.



R. POZZI.

HOT AIR FURNACE.

APPLICATION FILED Min/1,1915.

Patented F6bf20, 1917.

WITNESSES: INVEN'EOR Romeo P02 2 i.

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nor-Am ruaiviion.

Specification of Letters Patent.

assessed s 1, 1915. 7 Serial amass); i

To all whom it may concern a;

I zen of the United States, residing at Oakland, in the county of Alameda and State of California, have invented new and useful Improvements in Hot-Air; Furnaces, of which the following is ajspecification. This invention relates to a hotiair furnace.

The object of theinventionis to provide a series of air chambers and p assages which. are so -.arranged' withinthej furnace that .c

P i y every eetsun t ppli w l e absorbed 'by'the air" and-not wasted by escaping to the stack as is; usually thecase,

and 5 Further objects will hereinafter appearQ The invention consists of the parts and the j construction and. combination of parts. as hereinafter more fully ig described and claimed, having reference to the accompanys w ngsainw iclh I Figure l; is ;a central vertical section through the furnace. A V v Fig.2 is a plan section on line 2 2,'Fig. 1. Referring to the drawings' -i'n ,detail, A

indicates "a cylindrical-shaped casing to the tweenthe chambers, and formed on one side of thelower chamber :is annopening of the same height as the depth: oft-he lower chamber 5. One side of the casingA ,lSBX- tended at 30 to lie tangential to thecasing and a part 7 ofthe bottom offthe casing is likewise extended to form'withthe extension 30 and the outer end 31 of a strip 10,

the bottom, and" two sides'of a conduit connected to an air blower 8 which latter may be driven by an electric motor 9; The topof the conduit is formedbyja 'c'apf32 shown in fragment in Fig. 2. The strip '10 has its major portion disposed. parallel to the. side walls of the cas'ing A and has its inner vend 33 terminating opposite to the adjacent major part of the strip, The end 31 of strip 1O abuts the. adjacent'side wall formed bythe opening'iA, the conduit andstrip 10 and a the side walls of casing A forming a spiral air passage 11. The plate 3 seats on top of strip '10 and is shaped to abut theinner side faces of the side walls of easing A, the plate forming the top, and the bottom of easing I ed by alplurality of arms from the top of jwhieh willcarry the fumes 50f v combust on we a amiti ate, This as .sage' ll imparts a swirling movement t'o-the alrdelivered by the: bloweiflS and enter- 7 lngthedower chamber. .The, air then passes through -the opening. 6 plate 3 up into the chaniberji, and: ishere permitted to es- 7 cape through a 'plurality} ofjfdistributing fines-not here shown, which are: connected w1th the d schargeopenmgsl-Qx Suspend t r a e and-Po t n id r t y bo the op en1ng' 6 isia water pan 14:, which may nace is a safety valve '16 andtpositioned bebe filledfrom time totime through a} filler V 7 cap 15. Positioned in the top 'of'fthe fur-,

low the bottomfof-the furnace is a heavy iron to the lower chamber from a burner: generally indicatedfatflS, Any form-go'f gaslor oil burner cor-coal furnacemay be mounted 1 ;7 i below the furnace to ,provlde the' necessary heat but the most convenient arrangement employed is the 1 form ofv gas burner: shown havin valve within a caSin -Vf 'o erated v v. b

by a hand wheel V. For the purpose of preventing the h'eat of combustion from escaping too'readily around the sides of thecfur- .nace, a downwardly-extending annular hood 19 h'asbeen provided. 7 This is held-inpo'si plate 17, which is provided vfor the pi' rpose 10f evenly distributing andradiating heat v so T tionlby means of anairntdanfiarige 2O secured exteriorf the furnace; Wall ,and; is yprovided with adischarge vent 21-, Which may be connected yvithvc rfrs fir R P awayrfrom the furnace; Thelower end of 3 a 5. s wn-in. ig-:-

I Q The; operation f ofprevents the bottom of the furnace from beingfburntiand'at thersame time forms a mea'n's for evenly distributing theheat over "the lower-surface ofthe furnace, The motor 9, withconnected blower 8 is then starttheihood is entirely open a'nd inthis man- .ner permits a;p' erfect circulation of air to support the 'combustion.- Ho'odlf) has -an opening 35 throughwhich projects theparts th"'jf ,urnace,'as aQwhOle, Wlll bG as follows':;The burner 18 is first ed," thuscausing air'to enter through thespi-i rally arrangedpassage ll formed inv the lower chamber-=5. The'ente ring air is thus givena swirling movement andcaused to passover the entire heated surface offthe furnace before it is finally permitted to escape through the. opening 6 into the'u'pper brought to the desired temperature and in escaping through the opening 6, strikes the bottomof the water pan where it heats the water sufliciently to permit this to slowly evaporate and pass off with the warm air through the discharge openings 12 with connected distributing flues' not shown. The water pan may be filled from time to time by removing the cap 15, thus preventing the discharging air from becoming too dry. The products of combustion escaping from the burner 18 collect in the hood 19- where they hcatthe sides of the lower chamber before they finally: escape through the vent 21. An eflicient', snnple, compact hot air furnace is in this manner provided, which can be easily and economically operated by anyone. sists of a weighted cover supported by a pivot 16*; This coveropens-when the distributing flues are closed, and in this manner prevents the furnace from becoming overheated. Any suitable form of burner, as previously described, may be employed and any means similar to the blower here shown, may beprovided for the purpose of causing a perfect circulation of fresh air through the furnace. The air may be taken from the exterior of the building or from the basement proper and as the furnace as a Whole is comparatively low in proportion to its diameter, it can readily be seenthat it can be conveniently installed in practically any building.

The materials and finish of the several parts of the invention may be such as the judgment and experience of the manufacturer may dictate.

I wish it understoodthat various changes in form, proportions and minor details of construction may be resorted to within the scope of the appended claims, and that I do not wish to limit myselfto the specific-dc sign and construction here shown.

Having thus described my invention, what I claim and desire to secure by Letters Patent is 1. A hot air furnace including a cylindrical casing having a top and a bottom, a plate in the casing dividing same into an upper and a-lower chamber, said casing having a peripheral opening of the same height Copies of this patent may be obtained for five cents each, by addressing the"Commissioner of The safety'valve 16 merely con-' as the depth of the lower chamber and one side of the casing adjacent one side of said opening being tangentially extended therebeyond, a strip seated on the casing bottom and arranged at its'outer end to lie parallel to said extension of the casing side and abutting-the wall formed by the opposite side of the opening and having its major portion disposed within the casing and extending parallel to the casing sides and terminating in a free end which lies opposite to the major'portion of the strip, said plate being seated on top of the strip and abutting the casing sides and having a central opeuing, an outlet in the'casing above the plate, a burner beneath'the casing, said casing bottom beingextended between the outer end of the strip and the'extension of the casing side, and a hood secured exteriorly' of the casing and having a depending flange formed with an opening through which the casing extension, the outer end of the strip and said extension of the bottom of the casing projectf 2. A hot'air furnace including a cylindrical casing having a top and a bottom, a plate in the casing dividing same into an upper and a lower chamber, said casing having a peripheral opening of the same height as the depth of the lower chamber and one side of the casing adjacent one side of said opening being tangentially extended therebeyond, a strip seated on the casing-bottom and arranged at its outer end to lie parallel to said extension of the casing side and abutting the wall formed by the opposite side of the opening andhaving its major portion disposed within the casing and extending parallel to the casing sides and terminating in a free end which lies opposite to the major portion of the strip, said plate being seated on top of the strip and abutting the casing sides, and having a'central opening, an outlet in the casing above the plate, and a burner beneath the casing.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

RoMEo'Pozzi.

Witnesses:

JOHN H. HERRING, .W. W HEALEY. 7

Patents, 

